MT6315FP IC

Product Details
Product Details:

- Part Number: MT6315FP

- Sibling Variants: MT6315NP, MT6315OP, MT6315BP, MT6315TP, MT6315QP

- Manufacturer: MediaTek Inc. (MTK)

- Function: Secondary Power Management IC / 4-Phase Synchronous Step-Down (Buck) DC/DC Converter

- Output Current Capacity: Up to 5A per phase dedicated to CPU & GPU core power delivery

- Bus Communication: High-speed SPMI / I2C serial control with Remote Differential Voltage Sensing

- Safety Features: Integrated Over-Temperature Protection (OTP), Over-Current Protection (OCP), and Under-Voltage Lockout (UVLO)

- Package Type: Fine-Pitch BGA / WLCSP (Ball Grid Array)

- Mounting Type: Surface Mount Technology (SMD BGA Soldering / Reballing)

Usage:

- High-Current Core Regulation: Takes the heavy electrical load off the primary PMIC by supplying regulated VCORE, VPROC, and VGPU rails directly to the application processor during intensive tasks.

- Target Devices (Multi-Brand 5G Support):

* Xiaomi / Redmi: Redmi Note 12 Pro 5G, Redmi Note 11 series (MediaTek variants), Redmi K-series

* Oppo / Realme: Oppo Reno series, Realme GT Neo (Dimensity editions), Realme 9/10 Pro+ series

* Infinix / Tecno: Infinix Zero 5G series, Tecno Camon / Phantom series

* Vivo / iQOO: Vivo V-series 5G, iQOO Z-series

* Other high-performance smartphones powered by MediaTek Dimensity 5G SoCs.

- Common Fault Symptoms & Motherboard Diagnostics:

* Dead Phone (No Power / No Boot): Device does not power on; on DC power supply, it pulses low (0.05A–0.15A) and drops to zero due to missing CPU core voltage.

* Dead After Flash: System fails to boot after software flashing due to hardware communication timeout or missing boot voltage from the MT6315FP chip.

* VCORE / VPROC Inductor Short Circuit: Output coils around MT6315FP show a dead short to ground, causing instant heat dissipation upon voltage injection.

* Hang on Logo / Boot Loop: Voltage drop under CPU load prevents the Android operating system from fully initializing.

* Exact Suffix Requirement: Technicians must replace with the exact "FP" suffix; using NP or OP variants may fail to boot due to different preset startup voltages.